Usage and Example of C Library Function sin()

C Standard Library - <math.h>

C Library Function double sin(double x) Returns the radian angle x sine.

Declaration

Below is the declaration of the sin() function.

double sin(double x)

Parameter

• x 　-- A floating-point value representing an angle in radians.

Return Value

This function returns the sine of x.

Online Example

The following example demonstrates the usage of the sin() function.

#include <stdio.h>
#include <math.h>
int main()
{
　　　　double x;
　　　　double result;
　　　　x =　2.3;
　　　　result = sin(x);
　　　　printf("sin(%.2lf) sine is = %.2lf degree, x, result);
　　　　x =　-2.3;
　　　　result = sin(x);
　　　　printf("sin(%.2lf) sine is = %.2lf degree, x, result);
　　　　x = 0;
　　　　result = sin(x);
　　　　printf("sin(%.2lf) sine is = %.2lf degree, x, result);
　　　　return 0;
}

Let's compile and run the above program, which will produce the following result:

sin(2.3The sine of 0) is = 0.75　degrees
sin(-2.3The sine of 0) is =　-0.75　degrees
The sine of 0.00 is = 0.00 degrees

C Standard Library - <math.h>